已知集合A,B,C是全集为U的非空真子集,且满足:
,
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ceb1f338fa60976229d7ec6531b626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bed4f3b7d72db3b022165360678e8d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2021-11-27 10:14:08
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【推荐1】已知
,
,有下列四个式子:(1)
;(2)
;(3)
;(4)
.其中正确的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49de234eb3ad35a9523649f3bc870634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45372d974fd8c1341f339bc22f45f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582ad43edf388c096e7704d92340bf75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e921877e498256774fcc5f356c3dd6bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30fec4ed921c7a4393e3a1d37bfa691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff14ce85158e745b00efd0e9df67aba.png)
A.(1) | B.(2) | C.(3) | D.(4) |
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【推荐2】下列关于空集的说法中,正确的有( )
A.![]() | B.![]() ![]() | C.![]() | D.![]() |
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